More changes

scripts/portfolio.exs

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+defmodule Portfolio do
+    @behaviour Problem
+    alias Types.Chromosome
+
+    @target_fitness 180
+
+    @impl true
+    def genotype do
+        genes =
+            for _ <- 1..10, do:
+                {:rand.uniform(10), :rand.uniform(10)}
+
+        %Chromosome{genes: genes, size: 10}
+    end
+
+    @impl true
+    def fitness_function(chromosome) do
+        chromosome.genes
+        |> Enum.map(fn {roi, risk} -> 2 * roi - risk end)
+        |> Enum.sum()
+    end
+
+    @impl true
+    def terminate?(population, _generation) do
+        max_value = Enum.max_by(population, &Portfolio.fitness_function/1)
+        max_value > @target_fitness
+    end
+end
+
+
+soln = Genetic.run(Portfolio)